Common Receipt Method

Hi,

Any one help me the below said Business Requirement.

    

     We have 30 operating units all over India, we are collection the money from customers from all this operating units. We have one Common Bank Account to Deposit this money. 

1. Only one Bank to be Created

2. Only one Receipt Method to be create for that Bank

3. All Operating unit users to use this Receipt Method to make the Cash Receipt Entry.

How can we achieve this Requirement.

Thanks in Advance

Mohan